Microstructural Evolution During Friction Surfacing of Austenitic Stainless Steel AISI 304 on Low Carbon Steel |
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Authors: | H. Khalid Rafi N. Kishore Babu G. Phanikumar K. Prasad Rao |
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Affiliation: | 1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 60036, India 2. Department of Industrial Engineering, J.B. Speed School of Engineering, University of Louisville, Louisville, KY, 40292, USA 3. Joining Technology Group, Singapore Institute of Manufacturing Technology (SIMTech), 71 Nanyang Drive, Singapore, 638075, Singapore
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Abstract: | Austenitic stainless steel AISI 304 coating was deposited over low carbon steel substrate by means of friction surfacing and the microstructural evolution was studied. The microstructural characterization of the coating was carried out by optical microscopy (OM), electron back scattered diffraction (EBSD), and transmission electron microscopy (TEM). The coating exhibited refined grains (average size of 5 ??m) as compared to the coarse grains (average size of 40 ??m) in as-received consumable rod. The results from the microstructural characterization studies show that discontinuous dynamic recrystallization (DDRX) is the responsible mechanism for grain evolution as a consequence of severe plastic deformation. |
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